HP serviceguard t2808-90006 manual Multipledevices and Componentdevices

Configuring your Environment for Software RAID

Configuring the Package Control Script and RAID Configuration File

	Again, if the network is set up in such a way that when the links
	between the sites fail, the communication links to the application
	clients are also shut down, then the unintended writes are not
	acknowledged and have no long term effect.
IMPORTANT	The value you set for RPO_TARGET must be more than the value you
	set for the RAID_MONITOR_INTERVAL parameter. By default, the
	RAID_MONITOR_INTERVAL parameter is set to 30 seconds.

For example: RPO_TARGET=60 seconds

•MULTIPLE_DEVICES AND COMPONENT_DEVICES

Parameter RAID_DEVICE [ ] specifies the MD devices that are used by a package. You must begin with RAID_DEVICE[0], and increment the list in sequence. Component device parameters DEVICE_0[ ] and DEVICE_1[ ] specify the component devices for the MD device of the same index.

For example, if a package uses multiple devices such as

—md0 consisting of devices /dev/hpdev/sde and /dev/hpdev/sdf and

—md1 consisting of devices /dev/hpdev/sdg1 and

/dev/hpdev/mylink-sdh1

use

# md0

RAID_DEVICE[0]=/dev/md0;

DEVICE_0[0]="/dev/hpdev/sde";

DEVICE_1[0]="/dev/hpdev/sdf"

#md1

RAID_DEVICE[1]=/dev/md1;

DEVICE_0[1]="/dev/hpdev/sdg1";

DEVICE_1[1]="/dev/hpdev/sdh1"

The MD RAID device names and the component device names must be unique across the packages in the entire cluster.

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